what is the compression ratio in a 2.2l?

bump

 

if im not mistakin its a 10:1..

 

thats correct it is 10:1

 

no...it's 9:1 not 10:1 that is the 2.4....

 

no, the 2.4(LE5) is 10.4:1 and the 2.2(L61) is 10:1 stock.

 

correct.
LSJ=9.5:1
L61=10.0:1
LE5=10.4:1

 

I have been reading about compression ratios. I am going to use the Garrett turbo kit for my 2.2. I have a lot of other mods like forged internals coming, BUT I was thinking about going with 2.0L forged pistons to achieve a 9.5:1 comp. ratio. With low boost and a Compression ratio of 10.1:1 is 300hp achievable??? The forged pistons I found for the 2.2 can be ordered as 10.1:1 and I dont really know how much of a difference this will make.

so I want 300hp, should I go with lower boost and higher compression and go with the 10.1:1 OR higher boost and a 9.5:1 ratio?

 

The problem with going with the 2.0 pistons is they may have significantly different piston pin heights. The bore is the same across all the production ecotecs, its the stroke that changes. You'd have to mock up the engine to see what the deck height would be and figure CR from there. Or throw the forged 2.0 crank, rods, and pistons in the L61 block as a whole package.

 

Okay...i got a little mixed up for a second....blame working at night...

the L61 was introduced with a 9.5-10:1 CR (10:1 being the higher output introduced in 2003, the 145hp version, still being used today with a remake in 2007 to 148 with the introduction of the 32 Bit ECU not the 16 Bit ECU used in earlier years which allowed for a more aggressive tune to compliment the addition of the Cam Position Sensor) Being that when the motor first came out it had a stock CR of 9.5:1... rated at about 140HP. I forgot to add the ".5" at the end of my above statement....my fault...lol

 

the 2.0L pistons technically aren't forged

besides, you can just pick up some 2.2L pistons in the compression you desire and not have to worry about anything else.

you should be able to contact any of these piston makers and get a set of 9:1 compression pistons made and be set.

 

you should be ok making 300hp from a 10:1 compression piston. But i wouldnt recommend anything higher then that. You will then need meth injection or race gas to control knock. Wiseco makes the 2.2 pistons in a 8.9:1 and 10:1. I went with the 8.9 but im going for more power then 300.

 

alright thanks for all the help.

and I know the 2.0L pistons are not forged, I was looking at forged pistons (aftermarket) for the 2.0L and I was wondering if they would fit my 2.2L. But you guys answered those questions and were a really big help.

do any of you know if 300hp is attainable NA instead of FI?? I know it would be tough and I'm sure I'll end up going with the turbo.

If I just want to run 93 (premium) then should I got with 8.9:1 ratio. I'll shoot for a little more than 300hp.

 

im sure its possible. i dont think the gm track car went from 148 to over 1000 on FI

 

so what might I have to do?? ....for 300hp NA

higher compression?

I wonder if I could do it with 10.1:1

input is appreciated.

I am already planning on using forged internals, machined head from Patriot Performance, new valve train including aggressive "stage 3" cams from comp cams, 2.4L H.O. intake manifold, CAI, header and full 3" exhaust.

how can I get higher compression? I know how to but is there a company that sells like 12:1 forged pistons for the 2.2L?

also I forgot.......bigger injectors, and underdrive pulley kit. I want to run on 93 premium

 

aem fic.

 

Check out the Intake Throttle Bodies over at ecotecforum.com

Very interesting stuff

 

thanks I found the SMG 62 MM straight through

 

You wont make 300hp NA with 10.1:1 CR. You would need 11.5:1 or higher, a 8000+rpm redline and a hell of a tune to get even close. A 3" Exhaust for NA would be a tad big. 2.5 - 2.75 should be plenty but its not worth the price to go for 300hp NA on these cars. You can do it much easier and cheaper on FI and have room to grow.

 

with the Garrett turbo kit, what all will I need to make 300hp.

I am going with all of the other mods I mentioned PLUS the turbo kit if thats what I need to easily reach 300hp

I'm thinking that will be more than enough

If I turbo it and do these other mods, ('06 LS L61) will the AEM fuel/ignition controller be what I need to tune it??

 

there is no way in hell you'll ever be able to make 300 hp with the garret kit. what you would need is a t3/t4 50 trim. you would need to also need a 3" back exhaust and aem fic to tune not the pre tuned sct unit

 

i dont see it happening.

 

ok I didnt really either, but I figured I'd ask to see if there was just some big part of the picture I was missing. over 100hp per liter would be impressive NA,

so with a lot of engine work and the garrett kit 300hp does not seem possible?? Another guy on here thinks the garrett kit could be good for over 300hp.

 

I just checked out the Disco Potato compressor map, you can make just about 300whp on it but thats about as much as you would want to push it.

To do it you would need pistons and rods along with the kit, but the tune that comes with the kit is only good for the boost level it comes at, ~8psi. You would need to retune it but you cant do that yet. You may be able to use a piggyback from there tho. That could be a good way to go but you'd be the first to try it.

 

the gt28 can do up to 360hp which is said from garretts site.. i agree 300 is all youd want to push it..

listen to sw4, he knows very well what hes talking about, he has helped me on many occassions with my questions..

i believe i saw the 5 bolt disco design on a gt30.. it was on garretts site. will look later on..

i dont see 300hp that hard to make with a tune and 3 inch dp/catback and the rods and pistons..

Just remember the stock intake manifold can only take 350hp before ya no..poof..

 

alright thanks guys. 300hp is all I want to push anyway (trying for close to 300hp at the wheels). I am going to use the SS transmission (f35) and limited slip differential. So there is no reason to make more than 300hp as I will not have a drivetrain that can take it and be a reliable daily driver.

my plan was to use the AEM F.I.C., as for the intake manifold, I am going to use the 2.4L H.O. kit but I'm sure it will only take about 350hp as well, before poofing.